JP6186579B2 - Foam stabilization mechanism and liquid management device in wiping device - Google Patents

Description

  The present invention relates to an intaglio printing machine, and more particularly to a wiping apparatus that cleans a wiping roller that wipes off excess ink transferred to a plate surface.

  In general, intaglio printing is performed by transferring ink to the intaglio surface, and wiping off the ink adhered to portions other than the pattern portion with a wiping roller that rotates in contact with the intaglio surface, Printing is performed by transferring the ink of the remaining pattern portion onto the paper passing between the impression cylinders.

  After that, the wiping roller is immersed and rotated in a cleaning liquid such as a solvent placed in the wiping tank, and a plurality of brushes extending in the axial direction are in contact with the peripheral surface of the wiping roller in the cleaning liquid. The ink transferred to the wiping roller by wiping is removed by the cleaning action of the brush and the cleaning liquid, and is dissolved by the cleaning liquid.

  During printing, as the dissolved ink enters the wiping cleaning liquid, the liquid level in the wiping tank increases. For this reason, various devices have been conventionally used to maintain the liquid level at a constant level.

  For example, Patent Document 1 discloses a wiping tank using a cleaning liquid pressure. By installing a plurality of pipes having different lengths in the wiping tank, it is possible to detect the liquid level based on the pressure of the cleaning liquid entering the pipe.

JP 2013-39713 A

  Patent Document 1 makes it possible to measure the liquid level of the wiping tank even while the intaglio printing press is being driven. However, the cleaning liquid contains a surfactant, and bubbles are generated during cleaning. Therefore, when bubbles enter the pipe, the bubbles are erroneously detected as a liquid level, and there is a problem that the liquid level cannot be measured.

  In addition, since only the liquid level is measured, it is necessary for an operator to visually monitor the bubbles generated during driving and to take measures to eliminate bubbles such as adding an antifoaming agent and suctioning as appropriate. . Therefore, there is a problem that the working efficiency is very poor, and in some cases, bubbles overflow from the wiping tank.

  Furthermore, the length of the installed pipe is the measurable liquid level. Therefore, it is necessary not only to install multiple pipes according to the liquid level, but also to manage the liquid level corresponding to the length from one pipe to the next pipe. There is a problem that can not be.

  Therefore, an object of the present invention is to detect both the liquid level and the bubbles in the wiping tank in the intaglio printing machine without malfunctioning, and to automatically erase the bubbles appropriately and to remove the liquid in the wiping tank. An object of the present invention is to provide a foam stabilizing mechanism and a liquid management device for a wiping device capable of constantly managing the surface height.

  The foam stabilization mechanism in the wiping apparatus having the wiping tank storing the cleaning liquid for cleaning the wiping roller of the intaglio printing press according to the present invention measures the height of the foam in the wiping tank using air with respect to the wiping tank. For this purpose, the foam decompression means for supplying a predetermined amount of air, and the air from the foam decompression means are branched into two, and one of the branches is discharged into the foam in the wiping tank. A bubble measuring means having at least a foam flow measuring means for calculating the height of the foam in the wiping tank based on a balance fluctuation of the flow rate values of the two air according to the height of the foam, and a foam flow measuring means Comparing the difference between the two air flow values measured by the above and the difference between the preset air flow values and measuring the height of the bubbles in the wiping tank, the wiping tank A control means having an instruction function to erase bubbles, in the wiping tank, to supply an antifoaming agent or water, to erase bubbles in the wiping tank, and having at least a bubble erasing means.

  Further, in the foam stabilization mechanism of the present invention, the flow rate measuring means for foam is based on the water pressure associated with the air piping for releasing one of the two branched air from the foam decompression means into the foam in the wiping tank. A first flow rate measuring means for measuring the air flow value of the foam, and an air pipe arranged in parallel with the first flow rate measuring means for releasing the other of the branched air from the foam pressure reducing means into the atmosphere It is characterized by comprising second flow rate measuring means for measuring the flow rate value of the air released into the atmosphere by the air pressure according to the above.

  Further, in the foam stabilization mechanism of the present invention, the flow rate measuring means for foam measures the pressure difference between the two airs based on the air flow rate values measured by the first flow rate measuring means and the second flow rate measuring means. It further has a differential pressure measuring means.

  Further, in the foam stabilizing mechanism of the present invention, the foam erasing means includes a foam erasing agent tank storing an antifoaming agent or water, and a foam erasing agent that supplies the defoaming agent or water in the foam erasing agent tank to the wiping tank. When the foam height in the wiping tank is higher than the preset foam height measured by the foam flow rate measuring means, the foam removal agent supply pump removes the foam in the foam elimination agent tank. An agent or water is supplied into the wiping tank to eliminate bubbles.

  In addition, the liquid of the wiping apparatus having the bubble stabilizing mechanism of the present invention and the liquid level stabilizing mechanism for measuring the liquid level of the cleaning liquid in the wiping tank in order to make the liquid level of the cleaning liquid in the wiping tank constant. In the management apparatus, the liquid level stabilizing mechanism includes a liquid level decompression unit that supplies a predetermined amount of air to the wiping tank to measure the liquid level in the wiping tank using air. The air from the pressure reducing means for the liquid level is branched into two, one of the branched air is discharged into the cleaning liquid in the wiping tank, and the balance of the flow rate values of the two air according to the height of the liquid level in the wiping tank Due to fluctuations, at least a liquid level measuring means having at least a liquid level flow rate measuring means for calculating the liquid level in the wiping tank, and a cleaning liquid circulation means for collecting and re-supplying the cleaning liquid in the wiping tank are provided. Control means Furthermore, the difference between the two air flow values measured by the liquid level flow measuring means is compared with the difference between the preset air flow values to measure the liquid level in the wiping tank. When the liquid level in the wiping tank falls below the preset liquid level, it has a command function to supply the cleaning liquid into the wiping tank. The height of the foam in the wiping tank and the liquid of the cleaning liquid It is characterized by constantly managing the surface height.

  The liquid level stabilization mechanism of the present invention is installed between the liquid level decompression unit and the liquid level flow rate measurement unit, and the air from the liquid level decompression unit is a preset reference air flow rate value. The liquid level reference flow rate measuring means for measuring whether or not is provided.

  Further, in the liquid level stabilization mechanism of the present invention, the liquid level flow rate measuring means relates to an air pipe for discharging one of the two branched air from the liquid level decompression means into the cleaning liquid in the wiping tank. A third flow rate measuring means for measuring the air flow value of the cleaning liquid and a third flow rate measuring means, which are juxtaposed with the water pressure, to release the other of the branched air from the liquid level decompression means into the atmosphere. It is characterized by comprising a fourth flow rate measuring means for measuring the flow rate value of the air released into the atmosphere by the air pressure related to the air pipe.

  In the liquid level stabilization mechanism of the present invention, the liquid level flow rate measuring means is a liquid that measures the pressure difference between the two airs based on the air flow rate values measured by the third flow rate measuring means and the fourth flow rate measuring means. It further has a surface differential pressure measuring means.

  By using the foam stabilization mechanism of the present invention, it is possible to measure the foam and liquid level in the wiping tank of the intaglio printing machine using air, and therefore both the foam and the liquid surface are in contact with each other. It is possible to always detect the bubbles in the plate cylinder without causing malfunction of the sensor due to.

  In addition, when a bubble is detected, the bubble erasing unit is activated, so that the bubble can be appropriately erased.

  Furthermore, it is possible to always manage both the foam and the liquid level by the liquid management device having the foam stabilization mechanism of the present invention.

The schematic diagram which shows the wiping apparatus (M) provided with the liquid management apparatus (S) of this invention. The block diagram which shows the structure of the liquid management apparatus (S) which has the foam stabilization mechanism (N1) of this invention. The schematic diagram which shows the structure of the 1st flow volume measuring means (6-1) of this invention. The schematic diagram which shows the other shape of the discharge outlet (7) of the air piping of this invention. The schematic diagram which shows the structure of the 3rd flow volume measuring means (15-1) of this invention.

  Embodiments for carrying out the present invention will be described in detail with reference to the drawings. It should be noted that the present invention is not limited to the embodiments to be described below, and includes various other embodiments within the scope of the technical idea described in the scope of claims.

  First, after briefly explaining the wiping device (M) in the intaglio printing press, the embodiment of the bubble stabilizing mechanism (N1) of the present invention and the liquid management device (S) having the bubble stabilizing mechanism (N1) will be described. . FIG. 1 is a schematic diagram showing a bubble stabilization mechanism (N1) and a liquid management device (S) having the bubble stabilization mechanism (N1) in the wiping device (M) of the present invention.

  The wiping device (M) includes a wiping roller (1) and a wiping tank (2).

  The wiping roller (1) is a member that wipes off excess ink on an intaglio plate surface (not shown) mounted on the intaglio cylinder (3), and is disposed in contact with a position facing the intaglio cylinder (3).

  The wiping tank (2) is a tank in which a cleaning liquid (W) for dissolving and dispersing ink adhering to the wiping roller (1) is stored. The wiping tank (2) further includes a cleaning member (4) and a doctor blade (5).

  The cleaning member (4) is a brush and / or a scrub brush that comes into contact with the wiping roller (1) to remove ink, and is fixed to a support shaft (not shown) that makes surface contact with the wiping roller (1).

  The doctor blade (5) is a steel or resin member that wipes off the cleaning liquid (W) remaining on the surface of the wiping roller (1), and is located downstream of the cleaning member (4).

  During printing, the intaglio cylinder (3) on which the intaglio plate surface is mounted is driven to rotate counterclockwise, and the wiping roller (1) is driven to rotate counterclockwise. At that time, after the excess ink on the intaglio plate surface is wiped off by the wiping roller (1), printing is performed on the paper in a printing unit (not shown).

  Excess ink adhering to the wiping roller (1) is removed by moving the cleaning member (4) with the cleaning liquid (W) in the wiping tank (2) in contact with the wiping roller (1). . The cleaning liquid (W) remaining on the surface of the wiping roller (1) is wiped off by bringing the wiping roller (1) after the cleaning into contact with the doctor blade (5).

  Furthermore, the wiping device (M) includes a bubble stabilizing mechanism (N1) that is a device that erases bubbles after detecting bubbles in the wiping tank (2) using air.

  In the tank which has an opening part upward and stores a liquid, the height of the washing | cleaning liquid (W) in it can be confirmed visually. However, in the wiping tank (2), the liquid surface height of the cleaning liquid (W) therein is difficult to visually observe because a blind spot is generated by the wiping roller (1) and the doctor blade (5).

  Further, since the cleaning liquid (W) contains a surfactant, bubbles are generated during printing. Due to the bubbles generated in the wiping tank (2), the actual height of the bubbles and the level of the cleaning liquid (W) cannot be confirmed. Therefore, downtime may occur due to the overflow of bubbles and cleaning liquid in the wiping tank (2).

  Therefore, in the present invention, by measuring the foam height of the wiping tank (2) using air by the foam stabilization mechanism (N1), the foam enters the pipe in the technique of Patent Document 1. It is possible to detect bubbles separately from the liquid level without causing malfunction of the sensor due to the above.

  Moreover, although mentioned later for details, in this invention, the quantity of foam is calculated by the change of the flow volume of the air generated when air is discharged in the foam in a wiping tank (2). Since the air flow rate value is constant with respect to the total amount of bubbles in the wiping tank (2), the vicinity of the cleaning member (4) in the wiping tank (2) and the wiping tank (2) during printing. Even when the amount of foam is uneven at the inner side surface, it is possible to accurately measure the amount of foam. Therefore, it is possible to measure an accurate amount of foam using air and to add an appropriate amount of antifoaming agent based on the measured amount of foam.

  FIG. 2 is a block diagram showing the configuration of the liquid management device (S) having the foam stabilization mechanism (N1) of the present invention. In addition, in FIG. 2, although the liquid management apparatus (S) which consists of a foam stabilization mechanism (N1) and a liquid level stabilization mechanism (N2) is shown with the block diagram, first, the foam which is the feature point of this invention is shown. The stabilization mechanism (N1) will be described, and the liquid management device (S) having the bubble stabilization mechanism (N1) and the liquid level stabilization mechanism (N2) as another mechanism will be described later.

  Description will be made based on the schematic diagram of FIG. 1 and the block diagram of FIG. As described above, the foam stabilization mechanism (N1) measures the height of the foam in the wiping tank (2) using air, and then, based on the measured height of the foam, the wiping tank (2) as necessary. It is a mechanism to erase the bubbles inside.

  The foam stabilization mechanism (N1) is a foam measurement unit that measures the height of foam in the wiping tank (2) by using the pressure reducing means (Q1) for supplying air used to measure the height of the foam. Control means for controlling the operation of each means constituting the means (Q2), the foam erasing means (Q3) for erasing the foam in the wiping tank (2), and the foam measuring means (Q2) and the foam erasing means (Q3) (Q4).

  First, the bubble decompression means (Q1) will be described. The foam decompression means (Q1) is a means for continuously supplying a predetermined amount of air in order to measure the height of the foam in the wiping tank (2) using air. Connected with.

The air used when measuring the height of the bubbles in the wiping tank (2) is air having an air pressure necessary for measuring bubbles having a lower density than the cleaning liquid (W). In addition, the density in this invention is the mass per unit volume in a wiping tank (2). For example, if the mass per unit volume of 1 cm ³ is 1 g, the density is 1 g / cm ³ .

  Although details will be described later, in the present invention, the height of the bubbles is calculated from the change in the flow rate of the air generated when air is blown onto the bubbles in the wiping tank (2). Since the density of bubbles is lower than that of liquid, the higher the air pressure, the smaller the change in the air flow rate, making it difficult to measure the height of the bubbles.

  On the other hand, if the air pressure is too low, the air flow rate cannot be detected, the bubble height cannot be measured, and the bubbles overflow from the wiping tank (2), which is not preferable. Therefore, it is necessary to supply air suitable for foam from the foam decompression means (Q1). In addition, about the strength of air, the bubble of the washing | cleaning liquid (W) used for printing is measured previously, and an air pressure is set suitably according to the bubble.

  In general, a compressor is used as the air source, but the compressor is likely to fluctuate in the air pressure depending on the storage capacity. For example, when the air storage capacity is small, the air pressure fluctuates due to the stop of the compressor operation. Therefore, after the air from the air source is decompressed by the foam decompression means (Q1), it is supplied to the foam flow rate measurement means (6) described later, thereby stabilizing the height of the foam measured based on the air pressure. And can be measured.

  When the amount of stored air in the compressor is large, the compressor can be used as the bubble decompression means (Q1) in the present embodiment. On the other hand, when the amount of stored air in the compressor is small, air source and means for reducing the pressure of air, such as a regulator and a valve, are used as the foam pressure reducing means (Q1). A regulator is a pressure reduction control valve that lowers the pressure of air to a desired pressure. There are a general-purpose type and a precision type regulator, but a precision type is preferable in order to measure the height of the bubbles more accurately. It is also possible to control air using a valve.

  In this embodiment, since a minute fluctuation of the bubble is measured, it is necessary to measure a minute fluctuation in the air flow value. Therefore, if the air pressure of the compressor is a small air pressure of about 0.01 to 1.0 M · Pa, and there is little fluctuation, there is no need to reduce the pressure.

  On the other hand, the air pressure of a compressor used for a general known printing machine is as large as about 3.0 to 5.0 M · Pa. Therefore, since it is impossible to measure a minute change in the air flow value with a large air pressure, it is necessary to reduce the air even when the fluctuation in the air pressure is small.

  Next, the bubble measuring means (Q2) will be described. The foam measuring means (Q2) is a means for measuring the height of the foam in the wiping tank (2) using air, and the air from the foam decompression means (Q1) is branched into two. One is discharged into the foam in the wiping tank (2), and the balance of the two air flow rates changes with the height of the foam in the wiping tank (2), so that the foam in the wiping tank (2) It has at least a foam flow rate measuring means (6) for calculating the height.

  The foam flow rate measuring means (6) is a means for measuring the flow rate of air used when measuring the height of the foam in the wiping tank (2), and is connected to the outside of the wiping tank (2) via an air pipe. And connected to the bubble decompression means (Q1). In addition, air piping is a pipe | tube which connects each means which comprises a bubble stabilization mechanism (N1), and if it is a pipe | tube which can supply air, such as copper piping and a tube, it will not specifically limit.

  The foam flow rate measuring means (6) includes at least a first flow rate measuring means (6-1) and a second flow rate measuring means (6-2). The air from the bubble decompression means (Q1) is branched into two paths by the air pipe. One of the two branched paths is provided with the first flow rate measuring means (6-1), and the other path is provided with the second flow rate measuring means (6-2).

  The first flow rate measuring means (6-1) is a means for measuring the flow rate value of air released into the bubbles in the wiping tank (2) (hereinafter referred to as “air flow rate value”), and the second flow rate. The measuring means (6-2) is a means for measuring the air flow rate value released into the atmosphere outside the wiping tank (2). The first flow rate measuring means (6-1) and the second flow rate measuring means (6-2) are both connected to the foam pressure reducing means (Q1) and the wiping tank (2) via an air pipe. Yes.

  FIG. 3 is a schematic diagram showing the configuration of the first flow rate measuring means (6-1). The air from the bubble decompression means (Q1) is branched into two paths by the air pipe. A first flow rate measuring means (6-1) is provided on one of the two branched paths. The first flow rate measuring means (6-1) is connected to the wiping tank (2) via an air pipe.

  As shown in FIG. 3, the discharge port (7) at which the air is actually discharged at the tip of the air pipe is disposed in the bubble (B) in the wiping tank (2). Since the air supplied from the bubble decompression means (Q1) is continuously discharged from the discharge port (7) of the part, the discharge port (7) itself is disposed in the bubble (B). Furthermore, even if the height of the foam (B) in the wiping tank (2) increases, the foam (B) does not enter the air pipe.

  As shown in FIG. 3, the discharge port (7) at the front end of the air pipe arranged in the foam (B) measures the foam (B) in the wiping tank (2), so that the liquid level upper limit position ( It is arranged so as to have a distance (V1) that is higher than h1).

  The air flow rate value refers to the amount of gas flowing in a certain time. In the present invention, the air supplied from the bubble decompression means (Q1) and the liquid surface decompression means (Q5) described later is an air pipe. The amount of air flowing from the discharge port (7) of the air pipe for a certain time when discharged from the air pipe.

  In the wiping tank (2), the height of the foam rises or falls due to the increase or decrease of the amount of foam generated, and the resistance of the foam applied to the discharge port (7) of the air pipe that supplies air from the foam decompression means (Q1) ( Hereinafter, it is referred to as “water pressure”). Thereby, the water flow pressure value in the wiping tank (2) increases or decreases because the water pressure of the foam becomes a load on the discharge port (7). It is possible to measure the height of the bubbles in the wiping tank (2) by measuring the air flow value that increases and decreases and comparing it with the air flow value at the height of the bubbles when the preset bubbles overflow It becomes.

  Next, the second flow rate measuring means (6-2) will be described. The second flow rate measuring means (6-2) includes two paths of first flow rate measuring means (6-1) that are supplied from the bubble decompression means (Q1) and branched into two paths by the air piping. Prepare for the other route different from the route. The second flow rate measuring means (6-2) is connected to be juxtaposed with the first flow rate measuring means (6-1) via an air pipe.

  As for the second flow rate measuring means (6-2), the discharge port (7) from which the air is actually discharged at the tip of the air pipe is disposed at a position where air can be released into the atmosphere. For example, it arrange | positions out of the wiping tank (2) in a wiping apparatus (M).

  As described above, with respect to the bubbles, the air pipe discharge port (7) when one of the air branched in two from the bubble decompression means (Q1) is discharged into the bubbles in the wiping tank (2) is applied. The air flow rate was measured by the water pressure of the foam. In the atmosphere, the air flow rate value is measured by the air pressure applied to the discharge port (7) of the air pipe when the other of the air branched into two from the bubble decompression means (Q1) is discharged into the atmosphere. .

  When the first flow rate measuring means (6-1) and the second flow rate measuring means (6-2) are provided, the balance fluctuation of the flow rate values of the two airs accompanying the height of the foam in the wiping tank (2). Thus, the height of the foam in the wiping tank (2) can be calculated.

  For example, when the load on the discharge port (7) of the first flow rate measuring means (6-1) increases and the air flow rate value into the wiping tank (2) increases, on the contrary, the second flow rate measurement The load on the discharge port (7) of the means (6-2) is reduced, and the air flow rate value released into the atmosphere is reduced. Thus, the height of the foam in the wiping tank (2) is calculated from the balance fluctuation of the flow rate values of the foam and the two air in the atmosphere accompanying the height of the foam in the wiping tank (2). It becomes possible.

  As the first flow rate measuring means (6-1) and the second flow rate measuring means (6-2), a known flow meter can be used. For example, a flow meter manufactured by Keyence Corporation (sensor head: FD-). A1, FD-A10, FD-A100, amplifier: FD-V40A), a flow meter manufactured by SMC Corporation (PF2A710-02-27, PF2A750-02-27, PF2A750-03-27) and the like can be used.

  Further, the foam flow rate measuring means (6) may further comprise a foam differential pressure measuring means (6-3).

  The bubble differential pressure measuring means (6-3) is an air pressure difference (6-3) based on the air flow rate values measured by the first flow rate measuring means (6-1) and the second flow rate measuring means (6-2). (Hereinafter referred to as “differential pressure”), the first flow rate measuring means (6-1) and the second flow rate measuring means (6-2) outside the wiping tank (2), and the air piping. Connect and install through.

  Even with only the first flow rate measuring means (6-1) and the second flow rate measuring means (6-2) described above, the wiping tank (2) can be obtained by performing calculations using the control means (Q4) described later. It is possible to calculate the height of the foam inside. However, in that case, the height of the bubble is obtained by calculating the air flow rate values of the first flow rate measurement means (6-1) and the second flow rate measurement means (6-2) as two signals, respectively. Since it is calculated, the processing may take some time.

  However, the foam differential pressure measuring means (6-3) measures the air differential pressure of the first flow rate measuring means (6-1) and the second flow rate measuring means (6-2). When calculating the bubble height in the wiping tank (2) using the differential pressure of the air, only the differential pressure is calculated and can be grasped as one signal by the control means (Q4).

  Therefore, it is not necessary to perform calculations using the two signals, and it is possible to perform processing in a short time and calculate the height of the bubbles. A known differential pressure gauge can be used as the foam differential pressure measuring means (6-3). For example, a differential pressure gauge manufactured by Yokogawa Electric Corporation (fine differential pressure sensors: JP208-DEC, JP208-DNC, JP208-DGC), a differential pressure gauge (PSE550) manufactured by SMC Corporation, or the like can be used.

  As described above, in order to measure the height of the foam in the wiping tank (2), the air supplied from the foam decompression means (Q1) is branched into two, one of which is the first flow rate measurement means (6 -1), the other is supplied to the second flow rate measuring means (6-2), and the height of the foam is measured by the flow rate value, or the height of the foam is measured by the differential pressure with respect to each. However, it is not always necessary to bisect the air branched into two.

  For example, when the air from the bubble decompression means (Q1) is 100%, 40% air is supplied to the first flow rate measuring means (6-1) and 60% is supplied to the second flow rate measuring means (6-2). % Air may be supplied. In this case, there is no problem as long as the flow rate values in both of the reference measuring means are properly grasped. However, since the increase / decrease in the height of the bubble is determined based on the balance between both flow rate values, it is preferable to supply air at 50% each because it becomes easier to grasp the increase / decrease in the height of the bubble.

  Furthermore, about the reference | standard time which measures the ratio of the air supplied to a 1st flow measurement means (6-1) and a 2nd flow measurement means (6-2), in a wiping tank (2), a bubble and a washing | cleaning liquid are It is possible to use the flow rate value when the most appropriate bubble height is in the wiping tank (2) as a reference. It is important to know what balance is maintained between the flow rates of both airs.

  However, since the air flow rate value varies slightly depending on the length and size of the air piping, even if the cleaning fluid is in the wiping tank (2), the air flow rate value will be accurate. Therefore, it is preferable to measure the flow rate values of both airs when the bubbles and the cleaning liquid are empty in the former wiping tank (2) and use them as a reference.

  The bubble stabilization mechanism (N1) may further include a bubble reference flow rate measuring means (8).

  The foam reference flow rate measuring means (8) means the air supplied from the foam pressure reducing means (Q1) before the foam flow rate measuring means (Q2) is measured. Is a means for measuring whether or not it is a preset reference air flow value, and is connected between the bubble decompression means (Q1) and the foam flow measurement means (Q2) via an air pipe. Install.

  The foam decompression means (Q1) uses air from a means for supplying compressed air such as a compressor and an air tank.

  Therefore, when there is a fluctuation in the air supplied from the bubble decompression means (Q1) due to the air storage capacity of the compressor, such as at the start and end of the compressor drive, supply to the foam flow rate measurement means (Q2). Since the amount of air to be supplied is not constant and the amount of air that fluctuates up and down is supplied, the amount of air that is sent into the wiping tank (2) is also supplied as the amount of air that fluctuates up and down. If it becomes so, it will become impossible to measure the height of the bubble in a wiping tank (2) correctly.

  Therefore, before supplying air to the bubble flow rate measuring means (Q2), measure the presence or absence of air fluctuation, and if the air fluctuation is severe, adjust the foam pressure reducing means (Q1) and wipe more accurately. It becomes possible to measure the height of the foam in the tank (2). The adjustment of the bubble decompression means (Q1) may be performed manually or the air reference fluctuation measurement means (8) and the foam decompression means (Q1) are linked to keep the air fluctuation constant. It may be kept.

  In addition, although the discharge port (7) from which the air is actually discharged at the front end of the air pipe has the same diameter as the air pipe as shown in FIG. 3, the present invention is not limited to this.

  FIG. 4 is a schematic view showing another shape of the discharge port (7) of the air pipe. As shown in FIG. 4, the discharge port (7) of the air pipe that discharges air into the foam in the wiping tank (2) may be formed in a trumpet shape that expands in diameter.

  By making the discharge port (7) in a trumpet shape, the contact area between the bubbles and the discharge port (7) is increased as compared with the case where the diameter is the same as that of the air pipe described above. Thereby, there exists an advantage that it becomes easy to detect a bubble. However, in the case of the trumpet shape, the air flow detection becomes dull due to the dull air flow fluctuation, so the installation area is set appropriately according to the air flow.

  Next, the bubble erasing means (Q3) will be described. The bubble erasing means (Q3) is a means for erasing bubbles in the wiping tank (2) generated during printing. Conventionally, the foam generated in the wiping tank (2) was visually monitored by an operator and removed each time. Therefore, if the monitoring is neglected and the foam overflows from the wiping tank (2), the operation of the printing machine is stopped, and the cleaning work and the foam removal work are performed.

  By providing the bubble erasing means (Q2), it is possible not only to reduce the quality of the cleaning liquid and the load on the worker, but also to maintain a stable bubble height at all times. Therefore, it is possible to perform printing continuously without causing downtime.

  The foam erasing means (Q3) includes at least a foam erasing agent tank (9) and a foam erasing agent supply pump (10), and each is connected via a liquid pipe (not shown). The liquid pipe is a pipe that connects each means constituting the bubble erasing means (Q3), and is not particularly limited as long as it is a pipe that can supply liquid such as a copper pipe and a tube.

  The foam erasing agent tank (9) is a means for storing a liquid for erasing the foam, and is connected to the vicinity of the outside of the wiping tank (2) via a foam erasing agent supply pump (10) and a liquid pipe. Foam generated in the cleaning liquid can be erased by spraying water in a mist state or by putting a defoaming agent that is a silicone emulsion (KM-73E) into the wiping tank (2).

  Therefore, when erasing the foam using water, the foam erasing agent tank (9) is a means for storing water, and when erasing the foam using the antifoaming agent, the foam erasing agent tank (9 ) Is a means for storing the antifoaming agent. Hereinafter, it demonstrates as a case where a bubble is erase | eliminated using an antifoamer.

  The foam erasing agent supply pump (10) is a means for supplying the defoaming agent in the foam erasing agent tank (9) to the wiping tank (2), and is provided outside the wiping tank (2) via a liquid pipe. Arranged in connection with the erasing agent tank (9) and the wiping tank (2). In addition, a publicly known pump, such as a diaphragm type pump, can be used for this foam elimination agent supply pump (10).

  The foam erasing agent supply pump (10) is controlled by the control means (Q4) described later according to the height of the foam in the wiping tank (2) measured by the foam measurement means (Q2), An antifoaming agent is supplied to the wiping tank (2).

  When the foam height in the wiping tank (2) is equal to or higher than a preset height, the foam erasing agent tank ( From 9), the antifoaming agent can be supplied into the wiping tank (2) through the foam erasing agent supply pump (10).

  Thereafter, when the height of the foam in the wiping tank (2) is not more than a preset amount, the control means (Q4) stops the operation of the foam erasing agent supply pump (10), thereby eliminating the foam. The supply of foaming agent is stopped. By repeating this operation, it becomes possible to continuously supply the required amount of antifoaming agent into the wiping tank (2).

  In addition, in a foam elimination agent tank (9), you may further have a scale for measuring the quantity of the antifoamer in a foam elimination agent tank (9). Measure the remaining amount of antifoaming agent with a weigh scale, and if the remaining amount is low, put a new antifoaming agent in the foam-eliminating agent tank (9) to stably erase the foam. Make it possible.

  The control means (Q4) is a part for controlling the operation of each means constituting the pressure reducing means for foam (Q1), the foam measuring means (Q2) and the foam erasing means (Q3). In the control means (Q4), the operation of each means constituting the liquid management apparatus (S) using the liquid level stabilization mechanism (N2) described later is also controlled. This will be described later.

  The control means (Q4) includes at least a calculation means (11), a comparison means (12), an A / D conversion means (13), and a storage means (14).

  The calculation means (11) is a means for calculating the measurement values measured by the respective means constituting the bubble measurement means (Q2) by a preset calculation method. For example, the height of bubbles in the wiping tank (2) is calculated by calculating the air flow rate value measured in the first flow rate measuring means (6-1) by the calculating means (11) by a preset calculation method. calculate.

  The comparison means (12) is a means for comparing the bubble height, which is the calculation result in the calculation means (11), with the bubble height, which is a preset reference value. The comparison means (12) has a command function for controlling the operation of each means based on the comparison result. For example, the height of the foam in the wiping tank (2) calculated by the calculation means (11) is compared with the height of the foam that is set in advance, and the height of the foam in the wiping tank (2) is the reference. When the height is higher than the height of the foam, the foam in the wiping tank (2) is erased.

  The A-D conversion means (13) is a means for converting the measured value measured by each means constituting the bubble measuring means (Q2) from an analog signal to a digital signal. When the measured value measured by each means constituting the bubble measuring means (Q2) is an analog signal, the digital value is converted by the A / D conversion means (13) so that the calculation means (11) can perform the calculation. Convert to signal.

  When the first flow rate measuring means (6-1), the second flow rate measuring means (6-2) and the bubble differential pressure measuring means (6-3) have sensor amplifiers (not shown), The numerical value to be measured is output as an analog signal as a change in current or voltage. Therefore, the signal output in analog by the A-D conversion means (13) is converted into a digital signal.

  The storage means (14) is used for measuring the height of the foam in the wiping tank (2), the reference value set in advance, and the value measured and set in each means constituting the foam measurement means (Q2). It is a means to memorize.

  As described above, the control means (Q4) issues a command to erase the foam using the result of measuring the height of the foam in the wiping tank (1) using the air by the foam measuring means (Q2). The antifoaming agent is supplied from the foam erasing means (Q3) to the wiping tank (2). Therefore, it is possible to erase the bubbles without stopping the operation of the wiping device (M).

  Further, the present invention is characterized in that the height of the foam is detected and the antifoaming agent is automatically supplied without stopping the operation of the wiping device (M). ) To detect the height of the cleaning liquid in the wiping tank (2) in addition to the height of the foam, and continuously recover excess cleaning liquid from the operating wiping tank (2). It becomes possible to provide a mechanism for supplying the cleaned cleaning liquid together with the new cleaning liquid to the wiping tank (2) of the wiping device (M).

  Next, the liquid level stabilization mechanism (N2) provided in the liquid management device (S) will be described. The liquid level stabilization mechanism (N2) is a mechanism for measuring the liquid level height of the cleaning liquid in the wiping tank (2) in order to make the liquid level height of the cleaning liquid in the wiping tank (2) constant. Pressure reducing means (Q5), liquid level measuring means (Q6) and cleaning liquid circulating means (Q7).

  First, the liquid surface decompression means (Q5) will be described. The liquid level decompression means (Q5) is means for continuously supplying a predetermined amount of air in order to measure the liquid level height of the cleaning liquid in the wiping tank (2) using air. Not connected with air source.

  The air used when measuring the liquid level in the wiping tank (2) is air having an air pressure required for measurement with respect to the measurement depth of the cleaning liquid (W) in the wiping tank (2).

  Although details will be described later, in the present invention, the liquid level is calculated from the change in the flow rate of air generated when air is sprayed onto the cleaning liquid in the wiping tank (2). Since the air flow rate varies depending on the water level of the cleaning liquid (W), the air flow rate decreases as the water level increases.

  On the other hand, when the water level of the cleaning liquid (W) is low, the air flow rate increases. If the supplied air pressure is too high, the fluctuation in the water level of the cleaning liquid (W) becomes small (dull), so that the accurate liquid level cannot be measured. Therefore, it is necessary to supply air suitable for the measurement range from the liquid pressure reducing means (Q5). In addition, the water level of the cleaning liquid (W) used for printing is measured, and the air pressure is appropriately set according to the water level.

  Since the air source is the same as the above-described liquid surface decompression means (Q1), description thereof is omitted.

  In this embodiment, since a minute fluctuation in the liquid level is measured, it is necessary to measure a minute fluctuation in the air flow value. Therefore, if the air pressure of the compressor is a small air pressure of about 0.05 to 1.0 M · Pa and there is little fluctuation, there is no need to reduce the pressure.

  On the other hand, the air pressure of a compressor used for a general known printing machine is as large as about 3.0 to 5.0 M · Pa. Therefore, since it is impossible to measure a minute change in the air flow value with a large air pressure, it is necessary to reduce the air even when the fluctuation in the air pressure is small.

  As described above, the cleaning liquid (W) has a higher density than bubbles. Therefore. The air used for measuring the height of the cleaning liquid in the wiping tank (2) is air having an air pressure necessary for measuring a cleaning liquid having a higher density than the bubbles (B).

  Next, the liquid level measuring means (Q6) will be described. The liquid level measuring means (Q2) is a means for measuring the liquid level height of the cleaning liquid in the wiping tank (2) using air, and the air from the liquid level decompression means (Q5) is branched into two. Then, the branched one is discharged into the cleaning liquid in the wiping tank (2), and the wiping tank (2) is caused by the balance fluctuation of the two air flow values with the height of the liquid level in the wiping tank (2). At least liquid level flow rate measuring means (15) for calculating the liquid level inside.

  The liquid level flow rate measuring means (15) is a means for measuring the flow rate value of air used for measuring the liquid level height in the wiping tank (2), and an air pipe is provided outside the wiping tank (2). And connected to the liquid surface decompression means (Q5). In addition, since air piping is the same as that of the above-mentioned bubble measurement means (Q2), description is abbreviate | omitted.

  The liquid level flow rate measuring means (15) includes at least a third flow rate measuring means (15-1) and a fourth flow rate measuring means (15-2). Air from the liquid surface decompression means (Q5) is branched into two paths by an air pipe. A third flow rate measuring means (15-1) is provided in one of the two branched paths, and a fourth flow rate measuring means (15-2) is provided in the other path.

  The third flow rate measuring means (15-1) is a means for measuring an air flow rate value released into the cleaning liquid in the wiping tank (2), and the fourth flow rate measuring means (15-2) is a wiping tank ( 2) A means for measuring the value of the air flow rate released into the outside atmosphere. The third flow rate measuring means (15-1) and the fourth flow rate measuring means (15-2) are both connected to the liquid surface pressure reducing means (Q5) and the wiping tank (2) via an air pipe. ing.

  FIG. 5 is a schematic diagram showing the configuration of the third flow rate measuring means (15-1). Air from the liquid surface decompression means (Q5) is branched into two paths by an air pipe. A third flow rate measuring means (15-1) is provided on one of the two branched paths. The third flow rate measuring means (15-1) is connected to the wiping tank (2) via an air pipe.

  As described above, when measuring the height of the bubble, the discharge port (7) through which the air is actually discharged at the tip of the air pipe is disposed in the bubble in the wiping tank (2).

  As shown in FIG. 5, when the liquid level is measured, the discharge port (7) is disposed in the cleaning liquid in the wiping tank (2). In the measurement of the liquid level, the air supplied from the liquid surface decompression means (Q5) is continuously discharged from the discharge port (7) at the tip of the air pipe. (7) Even if the liquid itself is disposed in the cleaning liquid (W), or even if the liquid level in the wiping tank (2) increases, the cleaning liquid (W) does not enter the air pipe. .

  As shown in FIG. 5, the discharge port (7) at the tip of the air pipe disposed in the cleaning liquid (W) is always cleaned even if the cleaning liquid (W) in the wiping tank (2) decreases. Therefore, it is arranged so as to have a distance (V2) that is close to (not in contact with) the bottom of the wiping tank (2).

  In the wiping tank (2), the liquid level rises or falls due to the increase / decrease of the cleaning liquid (W), and the water pressure applied to the discharge port of the air pipe that supplies air from the liquid level decompression means (Q5) increases. Thereby, when the water pressure becomes a load, the air flow rate value in the wiping tank (2) increases or decreases. It is possible to measure the liquid level in the wiping tank (2) by measuring the increasing / decreasing air flow rate value and comparing it with the air flow rate value at the preset liquid level height that results in overflow.

  As shown in FIG. 5, the liquid level height that overflows is the liquid level height (h3) at which the cleaning liquid (W) does not overflow outside the wiping tank (2) in the wiping tank (2). Yes, for example, the height from which the water level from the upper part (V3) of the wiping tank (2) is 0.5 to 1 cm.

  As an example, the depth of the wiping tank (2) is 21 cm, and the liquid level height when overflowing is the liquid level height when the water level from the upper part (V3) of the wiping tank (2) is 1 cm. A measurement method will be described. First, in order to determine the air flow rate value due to the rise in the water level of the wiping tank (2), the wiping tank (2) has an empty liquid level height (h3) of 0 cm. Measure the air flow value.

  Next, the air flow rate value in the wiping tank (2) when the liquid level height (h3) in the wiping tank (2) is 1 cm is set.

  Next, the air flow rate value when the liquid level height (h3) in the wiping tank (2) is 1 cm is calculated to be what percentage of the air flow rate value when it is empty. For example, if the air flow rate when the liquid level height (h3) measured by the third flow rate measuring means (15-1) is 1 cm is 98% of the empty air flow rate, The air flow rate value is 2%. Therefore, the fluctuation of the air flow rate value is 2% with the fluctuation of 1 cm in the liquid level height (h3).

  When the depth of the wiping tank (2) is 21 cm, and the liquid level height that overflows is the liquid level height (h3) 20 cm where the water level from the upper part (V3) of the wiping tank (2) is 1 cm, The air flow rate value of 60% is calculated by subtracting the air flow rate value of 40%, which is 20 times the air flow rate value of 2% per 1 cm of water level, from 100%, which is the empty air flow rate value. Is determined as the air flow value that causes overflow.

  Therefore, when the air flow rate value measured by the third flow rate measuring means (15-1) becomes 60% of the air flow rate value measured by the third flow rate measuring means (15-1), the wiping tank (2) It can be said that the liquid level reached an overflow.

  Next, the fourth flow rate measuring means (15-2) will be described. The fourth flow rate measuring means (15-2) includes two third flow rate measuring means (15-1) which are supplied from the liquid level decompression means (Q5) and branched into two paths by the air pipe. The other route different from the prepared route is prepared. The fourth flow rate measuring means (15-2) is connected in parallel with the third flow rate measuring means (15-1) via an air pipe.

  As for the fourth flow rate measuring means (15-2), the discharge port (7) from which the air is actually discharged at the tip of the air pipe is disposed at a position where air can be released into the atmosphere. For example, it arrange | positions out of the wiping tank (2) in a wiping apparatus (M).

  As described above, the cleaning liquid is supplied to the discharge port (7) of the air pipe when one of the two branched air from the liquid surface decompression means (Q5) is discharged into the cleaning liquid in the wiping tank (2). The air flow rate value was measured by the water pressure of the cleaning liquid. In the atmosphere, the air flow rate value is measured by the air pressure applied to the discharge port (7) of the air piping when the other of the air branched in two from the liquid level decompression means (Q5) is released into the atmosphere. To do.

  When the third flow rate measuring means (15-1) and the fourth flow rate measuring means (15-2) are provided, the wiping tank (2) is the same as the calculation of the height of the bubbles in the wiping tank (2) described above. The liquid level height in the wiping tank (2) can be calculated by the balance fluctuation of the flow rate values of the two air accompanying the height of the liquid level inside.

  In addition, as a 3rd flow measurement means (15-1) and a 4th flow measurement means (15-2), a well-known flow meter can be used, for example, the flow meter (sensor head: D-) by Keyence Corporation. A1, FD-A10, FD-A100, amplifier: FD-V40A), a flow meter manufactured by SMC Corporation (PF2A710-02-27, PF2A750-02-27, PF2A750-03-27) and the like can be used.

  The liquid level flow rate measuring means (15) may further include a liquid level differential pressure measuring means (15-3).

  The differential pressure measuring means for liquid level (15-3) measures the differential pressure based on the air flow rate values measured by the third flow measuring means (15-1) and the fourth flow measuring means (15-2). The third flow rate measuring means (15-1) and the fourth flow rate measuring means (15-2) outside the wiping tank (2) are connected and installed via an air pipe.

  Even with only the third flow rate measuring means (15-1) and the fourth flow rate measuring means (15-2), the wiping tank (2) can be obtained by performing calculation using the control means (Q4) described later. Although it is possible to calculate the liquid level in the inside, by installing the liquid level differential pressure measuring means (15-3), it is similar to the foam differential pressure measuring means (6-3) described above. It is not necessary to perform calculations using the two signals, and it is possible to perform processing in a short time and calculate the liquid level height.

  As the liquid level differential pressure measuring means (15-3), a known differential pressure gauge can be used. For example, a differential pressure gauge manufactured by Yokogawa Electric Corporation (a fine differential pressure sensor: JP208-DEC, JP208-DNC). JP208-DGC), a differential pressure gauge (PSE550) manufactured by SMC Corporation, or the like can be used.

  As described above, in order to measure the liquid level in the wiping tank (2), the air supplied from the liquid pressure reducing means (Q5) is branched into two, and one of them is the third flow measuring means ( 15-1), supply the other to the fourth flow rate measuring means (15-2), and measure the liquid level by the flow rate value, or measure the liquid level by the differential pressure with respect to each. Although the method has been described, the air that is branched into two does not necessarily have to be divided into two equal parts as in the bubble measuring means (Q2), and therefore the ratio is appropriately set.

  In addition, about the reference | standard time which measures the ratio of the air supplied to a 3rd flow measurement means (15-1) and a 4th flow measurement means (15-2) in a liquid level height, in a wiping tank (2) It may be based on an empty state without bubbles or cleaning liquid, or it may be based on the flow rate value when the most appropriate liquid level is supplied in the wiping tank (2). It is important to know what balance is maintained between the flow values of both airs under the reference conditions.

  The liquid level stabilization mechanism (N2) may further include liquid level reference flow rate measuring means (16).

  The bubble reference flow rate measuring means (16) means the liquid level pressure reducing means (Q5) before the air supplied from the liquid level pressure reducing means (Q5) is measured by the liquid level flow rate measuring means (Q6). Is a means for measuring whether or not the air from the air flow is a reference air flow value set in advance, and an air pipe is connected between the liquid surface pressure reducing means (Q5) and the liquid surface flow measuring means (Q6). Connect and install through.

  The advantage of measuring the foam reference flow rate measuring means (16) is the same as that of the above-described foam reference flow rate measuring means (8), and thus the description thereof is omitted.

  Next, the cleaning liquid circulation means (Q7), which is another means constituting the liquid level stabilization mechanism (N2) provided in the liquid management apparatus (S), will be described.

  The cleaning liquid circulation means (Q7) is a means for recovering and resupplying the cleaning liquid in the wiping tank (2), and includes at least a cleaning liquid recovery pump (17), a cleaning liquid tank (18), and a cleaning liquid supply pump (19). Each is connected via a liquid pipe (not shown). In addition, since liquid piping is the same as that of the above-mentioned bubble elimination means (Q3), description is abbreviate | omitted.

  The cleaning liquid recovery pump (17) is means for sending the cleaning liquid stored in the wiping tank (2) to the cleaning liquid tank (18). As this recovery pump, a known pump such as a spiral pump can be used.

  The cleaning liquid recovery pump (17) is installed near the outside of the wiping device (M) and connected to the cleaning liquid tank (18) via a liquid pipe.

  The cleaning liquid tank (18) is a means for storing the cleaning liquid to be recovered or supplied. In the cleaning liquid tank (18), Ph management and temperature management are always performed in order to obtain an optimum ph value and temperature when supplying the cleaning liquid.

  The cleaning liquid tank (18) has a heater (not shown) for temperature management and a ph meter for measuring the ph value. By installing the cleaning liquid tank (18), it becomes possible to store the cleaning liquid while always keeping it in an optimum state. The cleaning liquid tank (18) may further be provided with a mechanism for removing impurities such as ink residue mixed in the recovered cleaning liquid.

  A plurality of cleaning liquid tanks (18) may be installed. By installing a plurality of cleaning liquids, the cleaning liquid can be stably supplied by switching and using when the cleaning liquid becomes old or the remaining amount is low.

  In the cleaning liquid tank (18), a cleaning liquid recovery pump (17) and a cleaning liquid supply pump (19), which will be described later, are connected to each other in the vicinity of the outside of the wiping device (M) via a liquid pipe.

  The cleaning liquid supply pump (19) is means for supplying the cleaning liquid in the cleaning liquid tank (18) to the wiping tank (2), and outside the wiping tank (2), the storage means (11) and the wiping tank are connected via a liquid pipe. (2) is connected and arranged. As the cleaning liquid supply pump (19), a known pump such as a spiral pump can be used.

  When the liquid level stabilizing mechanism (N2) is provided in the liquid management device (S), the control means (Q4) described above further controls the operation of the liquid level measuring means (Q6) and the cleaning liquid circulation means (Q7). Perform together. Next, operation control of the liquid level stabilization mechanism (N2) will be described.

  In the calculation means (11), in addition to the calculation of the measurement value measured by the bubble measurement means (Q2), the measurement value measured by each means constituting the liquid level measurement means (Q6) is calculated by a preset calculation method. It is a means for calculating. For example, the height of the liquid surface in the wiping tank (2) is calculated by calculating the air flow value measured in the third flow rate measuring means (15-1) by the calculating means (11) by a preset calculation method. Is calculated.

  In the comparison means (12), in addition to the foam height compared in the foam measurement means (Q2), the value of the liquid level in the wiping tank (2), which is the calculation result in the calculation means (11), Compare the preset liquid level height value.

  In addition, in the comparison means (12), in addition to the operation control of each means of the bubble stabilization mechanism (N1), the operation control of each means of the liquid level stabilization mechanism (N2) is also performed. For example, the height of the liquid level in the wiping tank (2) calculated by the calculation means (11) is compared with the height of the liquid level that is set in advance as a reference, and the height of the liquid level in the wiping tank (2) is compared. Is equal to or lower than the reference liquid level, the cleaning liquid is poured into the wiping tank (2).

  In the AD conversion means (13), in addition to the conversion of the measurement value in the bubble measurement means (Q2), the measurement value measured by each means constituting the liquid level measurement means (Q6) is converted from an analog signal to a digital value. Convert to signal.

  In the storage means (14), in addition to storing the measurement value, setting value, etc., used for the above-mentioned measurement of the height of the foam, it is used in advance when measuring the height of the liquid level in the wiping tank (2). The measured reference values and the values measured and set in each means constituting the liquid level measuring means (Q6) are stored.

  As described above, an instruction to increase or decrease the cleaning liquid in the control means (Q4) using the result of measuring the height of the liquid level in the wiping tank (1) using the air by the liquid level measurement means (Q6). The cleaning liquid is emitted from the cleaning liquid circulation means (Q7) and supplied to the wiping tank (2). Therefore, it is possible to increase or decrease the cleaning liquid without stopping the operation of the wiping device (M).

  Next, the operation of the cleaning liquid circulation means (Q7) will be described. First, in the cleaning liquid recovery pump (17), the operation of the wiping tank (2) is controlled by the control means (Q4) according to the height of the liquid level in the wiping tank (2) measured by the foam stabilization mechanism (N2). ) Is recovered.

  When the liquid level in the wiping tank (2) reaches the preset upper limit water level, the cleaning liquid in the wiping tank (2) is operated by operating the cleaning liquid recovery pump (17) by the control means (Q4). Is recovered in the cleaning liquid tank (18). In addition, when the liquid level in the wiping tank (2) reaches the preset lower limit water level, the operation of the cleaning liquid recovery pump (17) is stopped by the control means (Q4), thereby Stop collection. By repeating this operation, the water level in the wiping tank (2) can be controlled.

  In addition, the foam stabilization mechanism (N1) and the liquid level stabilization mechanism (N2) constituting the liquid management device (S), and each means (Q1, Q2, Q3, Q4, Q5) constituting each mechanism (N1, N2) , Q6, Q7) are connected via a liquid pipe (not shown). Since the liquid pipe is the same as the above-described bubble erasing means (Q3), the description thereof is omitted.

  As described above, in the liquid management device (S), in addition to the bubble stabilization mechanism (N1), the liquid level stabilization mechanism (N2) is installed, so that the height of the bubbles in the wiping tank (2) in the wiping device (M) After detecting the liquid level of the cleaning liquid, an appropriate amount of antifoaming agent and cleaning liquid can be supplied into the wiping tank (2).

DESCRIPTION OF SYMBOLS 1 Wiping roller 2 Wiping tank 3 Intaglio cylinder 4 Cleaning member 5 Doctor blade 6 Flow measuring means for foam 6-1 First flow measuring means 6-2 Second flow measuring means 6-3 Differential pressure measuring means for foam 7 Discharge port 8 Reference flow rate measuring means for foam 9 Foam erasing agent tank 10 Foam erasing agent supply pump 11 Calculation means 12 Comparison means 13 A-D conversion means 14 Storage means 15 Liquid level flow measurement means 15-1 Third flow rate measurement means 15-2 Fourth flow rate measuring means 15-3 Liquid level differential pressure measuring means 16 Liquid level reference flow rate measuring means 17 Cleaning liquid recovery pump 18 Cleaning liquid tank 19 Cleaning liquid supply pump M Wiping device S Liquid management device N1 Foam stabilization mechanism N2 Liquid level stabilization mechanism Q1

Claims (7)

A foam stabilizing mechanism in a wiping apparatus having a wiping tank storing a cleaning liquid for cleaning a wiping roller of an intaglio printing press,
In order to measure the height of bubbles in the wiping tank using air with respect to the wiping tank, a depressurizing means for supplying a predetermined amount of air is branched from the depressurizing means for bubbles. First flow rate measuring means for measuring the amount of air flowing in a certain time from the discharge port of the air pipe for discharging one of the two airs into the foam in the wiping tank, and the first flow rate measuring means And a second flow rate measuring means for measuring the amount of air released into the atmosphere from the outlet of an air pipe for releasing the other of the two airs branched from the bubble decompression means into the atmosphere A foam measuring means comprising at least a foam flow rate measuring means comprising:
As a result of comparing the difference between the flow rate values of the two air measured by the flow rate measuring means for bubbles and the difference between the flow rate values of the air set as a reference in advance, and measuring the height of the bubbles in the wiping tank And a control means having a command function for erasing the bubbles in the wiping tank, and a foam erasing means for supplying an antifoaming agent or water into the wiping tank and erasing the bubbles in the wiping tank. A foam stabilization mechanism for a wiping device, comprising: A reference flow rate measurement for foam, which is installed between the pressure reducing means for foam and the flow rate measuring means for foam, and measures whether the air from the pressure reducing means for foam is a preset reference air flow value. The bubble stabilizing mechanism of the wiping apparatus according to claim 1, further comprising means. The foam flow measuring means further comprises a foam differential pressure measuring means for measuring a pressure difference between the two airs based on the air flow values measured by the first flow measuring means and the second flow measuring means. The foam stabilizing mechanism of the wiping device according to claim 1 , wherein the foam stabilizing mechanism is provided. The foam erasing means comprises a foam erasing agent tank in which an antifoaming agent or water is stored, and a foam erasing agent supply pump that supplies the defoaming agent or water in the foam erasing agent tank to the wiping tank. When the foam height in the wiping tank measured by the flow rate measuring means is equal to or higher than a preset foam height, the defoamer or water in the foam eraser tank is supplied by the foam eraser supply pump. The foam stabilizing mechanism of the wiping apparatus according to any one of claims 1 to 3 , wherein the foam is erased by supplying the liquid into the wiping tank. In order to make the bubble level of the wiping device according to any one of claims 1 to 4 and the level of the cleaning liquid in the wiping tank constant, the liquid level of the cleaning liquid in the wiping tank is set to be constant. A liquid management device for a wiping device having a liquid level stabilization mechanism for measuring,
The liquid level stabilizing mechanism is a liquid level decompression unit that supplies a predetermined amount of air to the wiping tank to measure the liquid level height in the wiping tank using air. A third flow rate for measuring the amount of air flowing in a certain time from the discharge port of the air pipe for discharging one of the two air branches from the pressure reducing means for liquid level into the cleaning liquid in the wiping tank Air is introduced into the atmosphere from a discharge port of an air pipe, which is juxtaposed with the measuring means and the third flow rate measuring means, and the other of the two air branches from the liquid pressure reducing means is released into the atmosphere. Liquid level measuring means having at least liquid level flow rate measuring means comprising a fourth flow rate measuring means for measuring the air flow rate value by the air pressure applied to the air pipe when released, and recovering the cleaning liquid in the wiping tank And re-use At least and a cleaning liquid circulation means for the,
The control means further compares the difference between the two air flow values measured by the liquid level flow measuring means with a preset reference air flow value difference, and determines the liquid in the wiping tank. When the surface height is measured and the liquid level height in the wiping tank is equal to or lower than the preset liquid level height, the wiping tank has a command function to supply the cleaning liquid into the wiping tank. A liquid management device for a wiping device characterized by constantly managing the height of bubbles inside and the height of a cleaning liquid.
A liquid surface that is installed between the liquid surface pressure reducing means and the liquid surface flow rate measuring means and measures whether or not the air from the liquid surface pressure reducing means is a preset reference air flow value. 6. The liquid management apparatus for a wiping apparatus according to claim 5, further comprising a reference flow rate measuring means. The liquid level flow rate measuring means is a liquid level differential pressure measuring means for measuring a pressure difference between the two airs based on the air flow rate values measured by the third flow rate measuring means and the fourth flow rate measuring means. The liquid management device for a wiping device according to claim 6 , further comprising:

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